Pyranine

{{chembox

| Watchedfields = changed

| verifiedrevid = 426193536

| ImageFile = Pyranine.svg

| ImageSize =

| ImageAlt = Skeletal formula of pyranine

| IUPACName = Trisodium 8-hydroxypyrene-1,3,6-trisulfonate

| OtherNames = 8-Hydroxypyrene-1,3,6-trisulfonic acid; Solvent Green 7; HPTS; Sulfonated hydroxy pyrene trisodium salt

|Section1={{Chembox Identifiers

| CASNo_Ref = {{cascite|correct|CAS}}

| CASNo = 6358-69-6

| UNII_Ref = {{fdacite|correct|FDA}}

| UNII = I2W85YOX9L

| EINECS = 228-783-6

| PubChem = 4136521

| StdInChI=1S/C16H10O10S3.3Na/c17-11-5-12(27(18,19)20)8-3-4-10-14(29(24,25)26)6-13(28(21,22)23)9-2-1-7(11)15(8)16(9)10;;;/h1-6,17H,(H,18,19,20)(H,21,22,23)(H,24,25,26);;;/q;3*+1/p-3

| StdInChIKey = KXXXUIKPSVVSAW-UHFFFAOYSA-K

| SMILES = C1=CC2=C3C(=C(C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])C=CC4=C(C=C(C1=C43)O)S(=O)(=O)[O-].[Na+].[Na+].[Na+]

| MeSHName =

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|Section2={{Chembox Properties

| C=16 | H=7 | Na=3 | O=10 | S=3

| Appearance = Yellow-green crystalline powder

| Density =

| MeltingPt =

| BoilingPt =

| Solubility = Soluble

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|Section3={{Chembox Hazards

| FlashPt =

| GHS_ref={{cite web |title=C&L Inventory |url=https://echa.europa.eu/information-on-chemicals/cl-inventory-database/-/discli/details/32949 |website=echa.europa.eu |access-date=13 December 2021}}

| GHSPictograms = {{GHS07}}

| GHSSignalWord = Warning

| HPhrases = {{H-phrases|315|319|335}}

| PPhrases = {{P-phrases|}}

| AutoignitionPt =

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Pyranine is a hydrophilic, pH-sensitive fluorescent dye from the group of chemicals known as arylsulfonates.{{cite web| url = http://www.chemindustry.com/chemicals/1196265.html| title = chem industry entry| access-date = 2007-12-31| archive-date = 2007-10-26| archive-url = https://web.archive.org/web/20071026155704/http://www.chemindustry.com/chemicals/1196265.html| url-status = dead}}{{cite web | url= http://ctdbase.org/detail.go?type=chem&acc=C005047 | title = Comparative Toxicogenomics Database entry}} Pyranine is soluble in water and is used as a coloring agent, biological stain, optical detecting reagent, and pH indicator.{{cite web|url=http://chemicalland21.com/lifescience/foco/PYRANINE.htm|title=chemical land 21 entry}}{{cite web | url = http://sci-toys.com/scichem/jqp000/4136521.html | title= Sci-Toys entry}} Pyranine is also used in yellow highlighters to provide their characteristic fluorescence and bright yellow-green colour. It is also found in some types of soap.{{cite web |url=https://www.whatsinproducts.com/chemicals/view/1/115 |title=D&C Green No. 8 (C.I. 59040) |website=whatsinproducts.com |accessdate=2023-05-04}}